/// <summary>
/// Obtains the observed lengths of each span on
/// this leg. In the case of cul-de-sacs that have no observed span,
/// the distance will be derived from the central angle and radius.
/// </summary>
internal Distance[] GetObservedDistances()
{
List <Distance> distances = new List <Distance>();
foreach (SpanInfo sd in m_Spans)
{
Distance d = sd.ObservedDistance;
if (d == null)
{
Debug.Assert(this.Leg is CircularLeg);
Debug.Assert(m_Spans.Length == 1);
// If this is a cul-de-sac that had no observed spans, get the
// circular leg to define the distance (in meters on the ground).
DistanceUnit mUnit = EditingController.GetUnits(DistanceUnitType.Meters);
distances.Add(new Distance(this.Leg.Length.Meters, mUnit));
}
else
{
distances.Add(d);
}
}
return(distances.ToArray());
}
/// <summary>
/// Reads a distance unit type.
/// </summary>
/// <param name="field">A tag associated with the item</param>
/// <returns>The distance unit that was read.</returns>
internal DistanceUnit ReadDistanceUnit(DataField field)
{
DistanceUnitType unitType = (DistanceUnitType)m_Reader.ReadInt32(field.ToString());
return(EditingController.GetUnits(unitType));
}